Power roller for compacting materials used in various types of surfacing



y 1 B. c. STEED ET AL 2,164,845

POWER ROLLER FORCOMPACTING MATERIALS USED IN VARIOUS TYPES OF SURFACINGFiled Aug. 28, 1956 Z SIueets-Sheet l 8 9 7 32 M 0 3o ZJYWQYA'OW BoydCari Ls 5Zeed flawaz'd Brow/z Wen B. C. STEED ET AL July 4, 1939.-

- POWER ROLLER FOR COIIPACTING MATERIALS USED IN VARIOUS TYPES OFSURFACING Filed Au 28, 1936 2 Sheets-Sheet 2 Patented July 4, 1939PATENT OFFICE 2,164,845- rowan ROLLER FOR- COMPACTING MATE- RIALS USEDIN SURFACING VARIOUS TYPES OF Boyd Curtis Steed, Salisbury, and HowardBrown Wentz, Statesville, N. 0.

Application August 28, 1936, Serial No. 98,389

7 Claims.

The object of our invention is to provide an improved power roller forcompacting materials used in various types of surfacing; to operateunder its own power to be movable under its own power at a 5 rapid rateof speed; to provide a roller which will give the results of a solidroller but at the same time will permit differentiating; and to providethe novel combination and arrangement of parts disclosed in theaccompanying drawings and herelil inafter described and claimed.

We attain these and other objects of our in-' vention by the mechanismillustrated in the accompanying drawings, in which- Figure 1 is a topplan view of the invention; 15 Fig. 2 is a side elevation of the machinein position for operating as a roller, with auxiliary wheels supportedclear of ground;

Fig. 3 is a side elevation of the machine in position for moving at arapid rate of speed, with 29 rollers i supported clear of ground;

Fig. 4 is a rear elevation of the invention when in the position shownin Fig. 2;

Fig. 5 is an alternate or modified form of drive;

Fig. 6 is a side elevation of the form of drive 25 shown in Fig. 5;

Fig. '7 is a section on line ll-l of Fig. 8, showing details of theconstruction of the rollers; and

Fig. 8 is a transverse section through the rollers on line 5-8 of Fig.7.

30 Like numerals designate like parts in each of the several views.

Referring to the accompanying drawings, we provide the twin rollers i,mounted on a suitable main or front frame 2. Rollers i rotate around 5hollow shaft 3 on tapered roller bearings i. Shaft t is mounted rigidlyto main frame 2 by means of keyed boxings 5. Boilers i are provided withsprocketsB, rigidly attached, which are driven by the chains 'l, whichin turn are driven by the 4 sprockets 8, which are keyed todifferentiate axles 8.

The motive power is supplied to the differential axles 9 by the engineill through the clutch ii, transmission i2, and differential i3, mountedon 45 the inside frame it. The differential axles 9 are equipped withhand brake assemblies i5.

The main frame 2 is supported at its front end either by one or twopreferably flat tread pneumatic rubber-tired wheels it; which are 0011-.

50 nected thereto by a fork I'l. I'he front wheels R8 are steered by aworm-driven steering device la. The worm-driven steering assembly ismanually controlled by a suitable conventional commercial steering wheeland column which may be con-"'v 55 veniently located with reference toother control.

(on. 94-5 o) as shown in Figs. Land 2, the worm being aflixed to thepost of the fork, as shown.

If two wheels are preferred, any suitable commercially built front axleassembly may be substituted for the fork H, but in that case the treadof the front wheels should not exceed that of the roller.

The twin rollers i rotate independent of each other to gain theadvantage of differentiation, but

. are spaced close enough together to give the ef- 10 feet of a solidroller. Each roller i is provided with an internal expansion brake shoei9 anchored to brake anchor 26 rigidly fixed to hollow shaft 3. Thebraking effect is accomplished by the brake shoe is being forced againstthe brake drum 2i 1 which is attached to the inside of the roller i.

We provide a hydraulic cylinder and piston 22 to operate the brake shoeit to engage the brake drum 2i, as shown in Fig. '7 of the drawings. Thehydraulic cylinder 22 is supplied with liquid 30 from a master cylinderthrough the tubes 45 leading to the channel 23 in said hollow shaft 3,and in turn through channel 23 to channel M in brake anchor 2i! as shownin Figs. 1 and 8. The brake is operated by the foot pedal 45, which iscon- 25 veniently located to the operator.

The machine is provided at its rear end with a rear frame 21! to whichare rigidly fixed the rear boxings 2i? and the front boxings 28a. Therear frames 21 and rear boxings 2d are capable of a 30 pivotal movementon the axle 29 which carries the rear auxiliary wheels 25. Front boxlngs2811 (Figs.

2 and 3) loosely engage the hollow shaft 3 to permit a slight rotationaround that shaft and an upand-down swinging movement of that shaft andof the rear portion of the front main frame, the front end of which withforks i'l pivots on the axle ifia. of the front wheels when the rear endof the main frame 2 and the rollers carried by shaft 3 are raised fromthe ground as shown in Fig. 3. 40 Shaft 3 is mounted rigidly to mainframe 2. Boxings 28a prevent movements sideways of the hollow shaft 3while permitting of the up-and-dowh movement of that shaft with therollers and the adjacent ends of the main frame and rear frame asdescribed.

We provide sprockets 30 rigidly attached to and operating with therubber tired wheels 25 whereby the wheels turn with the sprockets. Thesprockets 30 are driven by chains 3i, which in turn are driven bysprockets 32, which latter sprockets are rigidly attached to rollers l.The wheels 25 are equipped with a suitable conventional internal 4expansion hydraulic brake assembly operated by a suitable foot pedalconveniently located to the operator. The wheels 25 rotate around therear axle 29 on tapered roller bearings. The rear axle 28 .is rigidlymounted to frame 21 by the boxings 28, as shown in Figs. 2 and 3.

We provide double-acting hydraulic jacks 28 having a cylinder, a pistonand a piston rod, the lower end of the piston rod being pivotallyconnected at ll to the swlngable rear frame 21 and the upper end of thecylinder being pivotally connected at 42 to the upwardly slanting framemember 211. Frame members 2a are rigidly afflxe-d to the horizontalfront frame 2. Frame struts 33 which extend between frame members 2a.and 21 function to relieve the tension in hydraulic jacks 28. Framestruts 33 are rigidly affixed to frame members 20 and adjustably ailixedto frame member 21 by means of bolts or tapered and keyed pins "a. Itwill be noted that the members 33 are provided with a plurality ofspaced apertures whereby they may be secured in an adjustable positionby means of the bolts or pins 33a.

The hydraulic jacks 28 are supplied with liquid from a suitable mastercylinder (not shown) and operated by a suitable pump. We provide crossbraces 34, as shown in Fig. 1, which function to make the frame 21 morerigid.

In operating this machne as a roller the wheels 25 are jacked upwardly asufllceht distance to fully clear the ground. and supported by framestruts ll, thus permitting rollers i to come in contact with the surfaceto be rolled.

Movability of this machine under its own power at a rapid rate of speedis obtained by lacking frame member 2a upwardly a sufhcient distance tofully clear rollers I of the ground and supporting frame members In byframe struts 33, thus permitting rubber tired wheels 25 to support therear end of the machine.

Figs. 5 and 6 represent an optional attachment which may be used in caseit is desired to operate roller and pneumatic rubber tired wheelsindependent of each other.

The structure shown in Figs-5 and 6 is an assembly which is interposedbetween shaft 9 and the large rollers I and is hung between frames 2 andI4. The sprockets 8 are removed and the new assembly shown in Figs. 5and 8 is substituted. The spline hub 35 is keyed to the differentialaxle and replaces one of the sprockets I in Fig. 2. The sliding splinegear II is driven by spline hub 3! and may be shifted back and forth onthat hub by the fork 21a, which engages the collar 81, that collar beingintegral with or affixed to the gear II. Gear 3!. is shifted back andforth to engage either the sprocket II or the sprocketll. Sprockets I.and 40 both idle on shaft II. Sprocket II is affixed to or integral withgear Ila which drives chain ll. Sprocket ll is integral with or amxed togear 40a which drives chain I. When gear 30 meshes with and drivessprocket II. as shown in Fig. 5. the drive goes through gear Ila andchain II to sprocket 8| so as to drive the wheels 2!.

When gear 80 is in position to mesh with and drive sprocket I the drivegoes through sprocket ll and chain 1 to sprocket I to drive the bigrollon I. It will be noted from Fig. that sprocket ll, with its gear "a,is on a different hub from sprocket ,0 with its gear a, and that thesprockets with their respective gears operate independently of eachother.

What we claim is:

1. In a power rollerof the type described, the combination of a frontframe. a front wheel, means for steering same. twin rollers, an engineindependently controlled means operatively connecting said rollers withand driving them from the engine for easily controlled operation underits own power, a stationary shaft on which said rollers are revolublymounted, a rear frame pivotally connected to said shaft and swingabledownwardly to an angle relative to the front frame, an axle carried bysaid rear frame, wheels rotatably mounted on said arle, sprocketsatatached to and rotatable with said wheels, and power means for raisingand lowering the pivotal rear frame to bring the wheels into and out ofcontact with the ground and thereby to correspondingly raise or lowerthe rollers.

2. In a power roller of the type described, the combination of ahorizontal front frame,.a front rollable supporting and steering means,twin rollers, an engine independently controlled, means operativelyconnecting said rollers with and driving them from the engine for easilycontrolled operation under its own power, a stationary shaft on whichsaid rollers are revolubly mounted, a rear frame pivotally connected tosaid shaft and swingable downwardly to an angle relative to the frontframe, an axle carried by said rear frame, wheels rotatably mounted onsaid axle, sprockets attached to and'rotatable with said wheels, andpower means for raising and lowering the pivotal rear frame to bring thewheels into and out of contact with the ground and thereby tocorrespondingly raise or lower the rollers.

3. In combination with the mechanism defined in claim 1, the front framehaving rear upwardly slanting frame members, struts amxed at their upperends to said slanting members, and means for adjustably bolting thelower ends of said struts in either of a plurality of positions to therear frame, for the purposes described.

4. In combination with the mechanism defined in claim 2, the front framehaving rear upwardly slanting frame members, struts amxed at their upperends to said slanting members, and means for adjustably bolting thelower ends of said struts in either of a plurality of positions to therear frame, for the purposes described.

5. In a power roller operated and transported under its own power, thecombination of a substantially horizontal front frame, front rollableand supporting steering means, a roller, an engine, means operativelyconnecting said roller with and driving it from the engine, a hollowshaft on which said roller is mounted, a rear frame pivotally connectedto said shaft and swingable downwardly to an angle relative to the frontframe, an axle carried by said rear frame, wheels mounted on said axle,sprockets attached to and rotatable with said wheels, hydraulic powermeans for raising and lowering the pivotal rear frame to bend the wheelsin and out of contact with the ground and thereby to correspondinglyraise or lower the rollers.

6. In combination with the apparatus defined in claim 5, the front framehaving rear upwardly slanting frame members, struts affixed at theirupper ends to said slanting members, and means for adjustably boltingthe lower ends of said struts in either of a plurality of positions tothe rear frame, for the purposes described.

7. In a power roller capable of operation and transportation under itsown power, the combination of a front frame. a front wheel, means forsteering same, independently controlled twin rollers. an engine, meansoperatively connecting each of said rollers with and driving'them fromthe engine, a stationary shaft on which said rollers are revolublymounted, a rear frame pivotally connected to said shaft andswing'abledownwardly to an obtuse angle relative to the front frame, anaxle carried by said rear frame, wheels rotatably mounted on said axle,the aforesaid frame being of such length and the wheels so spaced as toequally distribute the weight and 10 driving power and braking power toeach of the two rollers and to each of the two auxiliary HOWARD BROWNwmrrz. 10

